- From: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
- Date: Wed, 19 May 2010 18:05:55 +1000
- To: raphael.troncy@eurecom.fr
- Cc: Media Fragment <public-media-fragment@w3.org>, Erik Mannens <erik.mannens@ugent.be>
After discussions from last week's teleconference, I have now fixed the wiki page. See http://www.w3.org/2008/WebVideo/Fragments/wiki/TemporalDimension . Cheers, Silvia. On Wed, May 12, 2010 at 9:43 AM, Silvia Pfeiffer <silviapfeiffer1@gmail.com> wrote: > To prepare for my action discussion, here is all the information together: > > The test cases for temporal dimension have been put together at > http://www.w3.org/2008/WebVideo/Fragments/wiki/TemporalDimension > > The open questions are: > 1. #t=a,a and a >= 0 (#2) > Is an empty fragment according to our [a,a[ definition of fragment. > Should we recommend UAs to not even send such fragments to server? > Also: should we recommend UAs to use this to set playback position? > > 2. #t=a,b and a > b (#3,9,10,13,15) > Is an example of a non-existent fragment. > Currently, Web browsers that encounter non-existing fragments ignore > the fragments and retrieve the complete resource. > If media fragment supportive browsers implement this with the range > request and a 416 range error, then nothing is retrieved. > This will lead to vastly different behaviour between legacy browsers > and supporting browsers. > Should we just accept this situation or is there something we can do better? > > 3. #t=banana (#25-33) > Is an example of an illegal string. > Right now we have a 200 OK on this, which is conformant with legacy > browsers, but not with non-existent fragment. > We should probably react in the same way. > > Cheers, > Silvia. > > > 2010/5/12 Raphaël Troncy <raphael.troncy@cwi.nl>: >> Dear Media Fragmenters, >> >> [Apologies for this late notice] >> >> Please, find below the agenda for this week telecon >> http://www.timeanddate.com/worldclock/fixedtime.html?day=12&month=05&year=2010&hour=09&min=00&sec=0&p1=0 >> Actions opened: >> http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/open >> >> Note that this week agenda is pretty much the same than the ones I'm sending >> since several weeks, so it's time to move on and we are expecting no >> regrets. >> >> I tried to get in touch with Yves without success as he is completely >> unavailable. Therefore, we will re-assign some actions tomorrow, in >> particular A-123 & A-160 from Yves. We will discuss A-161 that Silvia has >> done. Finally, we will discuss a policy regarding the editorship of the >> spec. >> Best regards. >> >> Erik & Raphaël >> >> ------------ >> >> AGENDA Teleconference >> W3C Media Fragments Working Group telephone conference 2010-05-12 >> ----------------------------------------------------------------- >> Wednesday, 12 May *09:00-10:00 UTC* >> Local time: >> http://www.timeanddate.com/worldclock/fixedtime.html?day=12&month=05&year=2010&hour=09&min=00&sec=0&p1=0 >> >> 12 May 2010, 0900 UTC >> 0200 (West US) >> 1000 (Galway) >> 1100 (Amsterdam, Sophia-Antipolis, Pretoria) >> 1800 (Tokyo) >> 1900 (Sydney) >> Bridge US: +1-617-761-6200 (Zakim) >> Bridge FR: +33.4.89.06.34.99 >> Bridge UK: +44.117.370.6152 >> Conference code : 3724# (spells "FRAG") >> Duration : 60 minutes >> ------------------------------------------------------------------- >> IRC channel : #mediafrag on irc.w3.org:6665 >> W3C IRC Web Client : http://irc.w3.org/ and http://www.w3.org/Project/IRC >> Zakim information : http://www.w3.org/2002/01/UsingZakim >> Zakim bridge monitor : http://www.w3.org/1998/12/bridge/Zakim.html >> Zakim IRC bot : http://www.w3.org/2001/12/zakim-irc-bot.html >> ------------------------------------------------------------------- >> >> Chair: Erik, Raphael >> ScribeList: http://www.w3.org/2008/WebVideo/Fragments/wiki/ScribeList >> Scribe: Silvia (On Deck: Conrad, Michael) >> Regrets: none >> >> Please note that Media Fragments WG telecons are for attendance by >> members and invited experts only. >> >> 1. ADMIN: >> * Roll call >> * PROPOSED to accept the minutes of the 14 April 2010 telecon: >> http://www.w3.org/2010/04/14-mediafrag-minutes.html >> * PROPOSED to accept the short minutes of the 28 April 2010 telecon: >> http://www.w3.org/2010/04/28-mediafrag-minutes.html >> * PROPOSED to accept the short minutes of the 05 May 2010 telecon: >> http://www.w3.org/2010/05/05-mediafrag-minutes.html >> * ACTION-119: Yves to request admins to set up a cvs notifications mailing >> list and notifications >> * ACTION-92: Erik and Raphael to coordinate the writing of papers >> ** Postpone (new deadline is May 8th 2010) >> * Next WG F2F: http://www.doodle.com/rt7fsz583hgzrcki >> ** Proposal: F2F meeting organized on 15-16 June in EURECOM/Sophia Antipolis >> by Yves and I >> >> 2. USE CASES & REQUIREMENTS >> >> * ACTION-156: Conrad to add a "bandwidth conservation use case" >> >> 3. SPECIFICATION: >> >> Debate: editorship policy of the specification >> >> 3.1 Media Fragment URI syntax: (Yves) >> >> * ACTION-152: Yves to change the formal syntax to reflect that we don't need >> a subdelim for selecting multiple tracks but we allow multiple track= in the >> URI >> >> 3.2 Protocol for URI fragment Resolution in HTTP: >> * ACTION-123: Yves to come up with ABNF for header syntax >> * ACTION-154: Yves to add a section 5.2.4 describing his new optimization >> * ACTION-160: Yves to send an email reporting the issue for track names >> * ACTION-137: Jack to check that 5.1 is implementable using the protocol >> >> 3.3 Rendering of Media Fragments URI in UA: >> * ISSUE-5 [Jack]: Handling spatial cropping requires information at >> client-side >> >> 3.4 Discovery of 'Track' and 'Named' fragments: >> * ISSUE-4 [Silvia]: Should we pre-define some track names? >> * Davy's strawman implementation using ROE: >> http://lists.w3.org/Archives/Public/public-media-fragment/2009Nov/0014.html >> * Silvia's blog post: >> http://blog.gingertech.net/2009/11/25/manifests-exposing-structure-of-a-composite-media-resource/ >> * Jack's proposal to write up that we should distinguish the mechanism (ROE, >> MPEG-21) vs the semantics >> >> 4. TEST CASES: (Michael) >> * Corrib test tool: http://ld2sd.deri.org/corrib/ >> * ACTION-161: Silvia to integrate the test cases into the spec >> * ACTION-146: Jack to identify and add in corrib any missing test cases for >> temporal fragments >> * ACTION-147: Michael to add all MF WG members to corrib >> * ACTION-148: Michael to add a copy TC functionality in corrib >> * ACTION-149: Michael to come up with a fix for overview vs. edit single TC >> in corrib >> * Suggestion of nasty test cases by Philip: >> http://lists.w3.org/Archives/Public/public-media-fragment/2009Dec/0015.html >> >> 5. ISSUES >> >> 5.1 Active: >> >> 5.2 Non-Active: >> * ISSUE-6 [Jack]: Temporal clips that require transcoding >> * ISSUE-7 [Michael]: User Agent Media Fragment Resolution and Processing >> * ISSUE-9 [Michael]: Should we have the media type inside the Test Cases? >> * ISSUE-12 [Raphael]: What's the relationship between Images (CSS) Sprites >> and the spatial dimension of the Media Fragments URI scheme? >> * ISSUE-13 [Raphael]: Write a IETF draft for proposing how to register the >> fragment scheme for all media types >> * ISSUE-14 [Davy]: How to deal with embedded time stamps >> * ISSUE-16 [Jack]: Combining axis is probably not going to be done by LC, >> but we should write somewhere that this is doable >> >> 6. IMPLEMENTATION: >> * ACTION-34: Jack to look at python-url library to see whether he could >> implement the logic on client side >> * ACTION-35: Raphael to look at curl and/or wget to see whether the logic >> could be implemented on client side >> * ACTION-70: Jack to commit in CVS (code directory) his python code doing >> the parsing on client side of the media fragment >> * Someone to investigate whether he could have an implementation in >> Javascript that does the client-side media fragments parsing? >> >> 7. AOB >> >> -- >> Raphaël Troncy >> EURECOM, Multimedia Communications Department >> 2229, route des Crêtes, 06560 Sophia Antipolis, France. >> e-mail: raphael.troncy@eurecom.fr & raphael.troncy@gmail.com >> Tel: +33 (0)4 - 9300 8242 >> Fax: +33 (0)4 - 9000 8200 >> Web: http://www.eurecom.fr/~troncy/ >> >> >> >> >
Received on Wednesday, 19 May 2010 08:06:50 UTC